奥陶纪 Save Sign in to save words Traditional (Taiwan): 奧陶紀 àotáojì ㄠˋ ㄊㄠˊ ㄐㄧˋ Ordovician (geological period 495-440m years ago) Character by character 奥(ào)Austria 陶(táo)surname Tao 纪(jì)order A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0